The molecular shape of a h 2c 2 molecule is 1) linear 2) angular 3) trigonal planar 4) tetrahedral

Molecular shape

Its name is acetylene, in which there are two pi bonds between two carbon and one sigma bond between two carbon. Each carbon has also sigma bond with hydrogen. The molecular geometry is linear.

  the   balanced   equation   for   reaction of   ca metal   with   o2 to   produce   cao   is as below

2 ca+ o2→ 2 cao2

  explanation

the reaction is   balanced     since the   number of atoms   in reactant side is   equal to   number of atoms   in   product side.   for   example   they   are 2   atom of   ca in   reactant   side   and   2   atoms of ca   in   the product side.

  the   process   is a   meet the   requirement   of   redox   reaction because :     calcium   is   oxidized   from   oxidation state 0   to 2+   while   oxygen   is reduced from   oxidation   state   0   to 2-

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.